<![CDATA[The development of Internet Protocol Version 6 (IPv6) networks requires routing mechanisms that can determine the preferred path while maintaining connectivity when network conditions change. Border Gateway Protocol (BGP) determines routes through a set of path-selection attributes. This study analyzes BGP Path Selection on IPv6 networks, examines the effect of Weight, Local Preference, and AS-Path Prepending on route selection, and evaluates Failover and recovery when the main path is disrupted. The study applies three phases of the Network Development Life Cycle (NDLC): analysis, design, and simulation prototyping. The simulation was conducted in GNS3 using four Autonomous Systems (AS 65001, AS 65002, AS 65003, and AS 65004) with primary and alternative IPv6 paths. Testing was performed under normal, failure, and recovery conditions using ping and traceroute, with comparisons between default and modified BGP attributes. The results show that the three attributes can control Path Selection according to the configured policy. Under normal conditions, the primary path produced an average latency of 61.97 ms with 0% packet loss. When the main path was disconnected, BGP successfully failed over to the alternative path. In the AS-Path scenario, the alternative path started responding at approximately 45 seconds after the disruption, with 44% packet loss during transition, and then returned to 0% after stabilization. The recovery test reported a transition period of approximately 2.007 seconds until the connection became stable.]]>
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